To cite package ‘MutationalPatterns’ in publications use:

  Freek Manders, Arianne M. Brandsma, Jurrian de Kanter, Mark Verheul,
  Rurika Oka, Markus J. van Roosmalen, Bastiaan van der Roest, Arne van
  Hoeck, Edwin Cuppen, Ruben van Boxtel (2022): MutationalPatterns: The
  one stop shop for the analysis of mutational processes BMC Genomics
  doi:10.1186/s12864-022-08357-3

A BibTeX entry for LaTeX users is

  @Article{,
    title = {MutationalPatterns: The one stop shop for the analysis of mutational processes},
    author = {Freek Manders and Arianne M. Brandsma and Jurrian {de Kanter} and Mark Verheul and Rurika Oka and Markus J. {van Roosmalen} and Bastiaan {van der Roest} and Arne {van Hoeck} and Edwin Cuppen and Ruben {van Boxtel}},
    year = {2022},
    journal = {BMC Genomics},
    doi = {10.1186/s12864-022-08357-3},
  }